Photographic exposure mechanism.



n. M. Humum, PHOTOGBAPHIC EXPOSURE MECHANiSM.

APFUCATIOH HLED OCT 20, 19!]- },298,723. I PatEnted Apia 1,19%).

- 3 SHEETS-SHEET i WITNESSES: OR.

. fz'ciMHZwZar ATTORNEYS.

u. M. HURLBUR T. PHOTOGRAPHIC EXPOSURE MECHANISM.

APPL ICAT5ON min net. 20, 191i,

Patented Apr. 1,1919. 3 SHEETS-SHEET 2 INVENTOR.

W! TNESSES 0. M. HURLBURT. PHOTOGRAPHIC EXPOSURE MECHANISM.

) APPLICATION FILED OCT. 20, 19!].

- Patented Apr. 1,1919.

3 SHEETS-SHEET 3- in/E5553;

all

DAVE Iii. HUFRLBURT, F ROCHESTER, NE'W 2 33K, ASSIGNOR T0 EASTMAN KQIDAE.

-.. .G'TPJE-J5FY, EOGHESTER, lil'l l fl' YORK, A C-DRIPGRATIGN 0E NEVJ Y :erzoaioaaarmc EXPGSUB-E iazscnanisia.

Epeciflcation o1 Lcitcrs f-Patcnt.

Patented ll, ilgj'li.

application fllcd'flctobcr E50, 1917. Serial No. 197,532.

Be known time I, Ia. However, ,chescer, in the count 01% hllonroe and n clear, and exact description or the same, ref- 4 once being had iothc accompanying draw s, forming a part of this specification,

(l lo the re:iFcrence-numeraAs marked thereon; p

present invention relates to photograoh and more pariicularly to photographic ii in cameras and it has for its object to pro-' v dc simple and elliciont exposure mocha- .-.n placing ihc film Winding device and the shutter operating device each under the control of the other to the and that two eaposures of the same film area maynot be made nor a portion of the film Wound out of the field of exposure Without being w posed" T o and other ends the invcnhon. resides in certain. improvements and combinations of parts all as will be hereinafter more fully explained the novel i'eabeing pointed 013*" in the claims at the d of the speciiicalien.

In the drawings:

- Figure 1 is a side elevation of a folding film camera constructed in accordance with and illnstracing one embodiment of my in:

venizo Fig, 2 a front elevation thereof is an enlarged detail section through illli, Winding mechanion taken substantially "no 33 of Fig. l;

IS an enlarged fragmentary view will)? .51 the controlling mechanism in nor mal position;

. Fig. tions of the parts of the mechanism after the shutter has been operated;

Fig. 6 is a similar View showing the positions of the parts While the film is being 'woimd;

T a section on the line7-7 of Fin. 6, and

Fig. 8 is a section taken substaniially on the line 8-8 of Fig. 4-.

Similar reference numerals throughout the several views indicate the same parts.

My imprmcnients.arc applicable to any l'ype of camcra but in the present instance, I have shown them applied to a folding pocket s a similar view showing the posi film camera of a familiar type comprising a body 3. and a front 2 connected by a bellows 3, the from being movable on a folding bed 4; and carrying a shutter 5 the lens of which is indicated at 6 in Fig. 2. The shutter is operated by a cable release device of-a tfamili i" type embodying a flexible tubular 7 having a connection 8 as one cnd with iihe shutter casing- 5 and held at she other and by a clip or bracket 9 on the inside of Wall of the body 1, as shown in Figs. 2 and '2'. "i Vi'tliiii tliecasing operates a sliding cable or thrust membcr 10- Wliicl is also flexible and the outer end of which. (not shown) enters theshutter casing 5 to press againsv and operate a shutter tripping-or actuating part. 'lliie thrust, movement com-municaied to the cable by a sliding finger-piece ll. arranged on the exterior of. the body 1 and having an arm 12 extending through a: Wall of the'lattcr to terminals in an eye 13 in which the end of the-cable is secured in the present instance lav set screw 'le'l. The fingerfpieoe 11 is pressed downwardly to communicate ihc ehrust to the cable 10 and operate the shutter and 1 The latter has a sliding body portion 16 thal, operates in. a guideway 17 provided in a mounting plate 18 secured to the exterior of the camera body. When the shutter operaied a latchl'9 pivoted at 20 and impelled by a leaf spring 21 automatically engagcs with a shoulder 22 on the body 16 and holds the finger-piece ll dcpressc 1.. Hence the cable 10 is hold projected and until it ifcturns; the shutter parts" also cannot return the shutter cannot again be operatccl until the latch 39 is released.

The film ryinding device may consist of thaordinary' Winding key 23 shown in. section in Fig; 3. On its inner end it has a cross-piece 12% for cooperation Wit-l1 the slotted and of the film spool and at its outer end it has a wing or thumb picce fili journalccl in the key stem at 26 to move between the folded position of Fig. 3 or Fig. l and.

' lhecxtcnded position of Figs. 6 and The for rotating it upwardly or outwardly into its operative position from the folded pos1- tion. l

Above the mounting plate 18 is cover plate 30having an opening 31 therein coin-I cident with the well 28. This cover plate is removed in the showing" of Figs. at, 5 and 6.- Bctween it and the mounting plate operate two pi-voted leaves 32 and 33 which when closed, as in Figs. 1, 3 and 4, render the wardly projecting pins 43 and {Let and the guard 33 with one similar pin 45. The winding; operation 1s conducted while the guards are spread or inoperative as in Fig.

6. ,When they are closed they are locked in that operative, position by pin 44 on guard 32 becoming engaged by a shoulder 46 on a latch member 47 pivotedat 48 and turned to the right by a spring 4-9, as shown in Fig. 4. They remain locked until the shutter is operated and the body plate 16 of finger-piece 11 is drawn down. A shoulder 50 thereon thereupon depressesla lever 51 pivoted at 52 and engaging the lock member 4? at 53. This rocks the lock 4:? to the position of Fig, 5 releasing the pin 44, and the lock 47 is held in thisi-position by a spring latch finger 5a which prevents spring 49 from returning it. It will be here noticed thatspring 49 also operates lever 51 and through it seeks to return the fingerpiece slide 16 of the shutter operating'mem- But latch 19 has meantime gone-into her. the path of shoulder 22 on the finger-piec slide and it cannot return for another acti tion'of the shutter. The pin .4 being released as described, the guards 32 and 33 may now be g pened as in Fig. 6 to render the windinglzegfi- 23 accessible for turning whereupon pin 43 onthe guard leaf 32 displaces spring latch 55% as shown iii-said figure, freeing lock .47 for effective operation.

At the same time, pin 45 on guard 33 releases latch 19 from the shoulder 22 of the shutter slide" 16 and the latter returns ready for another operation of the shutter as also appears in Fig. 6. The closing of the guard blades again restores the positions of Fig.4 and the shutter may be again operated to expose the fresh length of film that has been drawn into the fieldof exposure.

Fig. t shows the film wound, the key locked against further winding and the shutter operating member free for actuation. Fig. 5 shows the shutter device opcrated and locked with the guards released, and Fig. 6 shows the shutter operating member released and the guards ready to be automatically locked as soon as they are closed to their operative positii'ms. '.l.hus, it will be seen that a movement of tl'ie'guards to wind the film must intervene between successive maeratious of the sluitter and an op= eration of the shutter must intervene between successive displz-iceuients and replace ments of the guard in Winding the film. 'Flmreforc; the film, once. the guards are closed, cannot be wound off until exposed and the same film cannot be. exposed twice without actuating the guards.

I. claim as my invention:

1. In a camera, the combination with a film winding device, a shutter and a shutter operating device, of means under the control of one of said devices for rendering thc, other inaccessible to the operator.

2. In a camera, the combination with a film winding key, a shutter and a shutter operating device, of means under the control of the. latter for rendering the fiim winding key inaccessible to the operator.

3. In a camera, the combination With a I film'wii'iding device, a shutter and ,shutter operating device, of means under the control of one of said devices for rendring the 9 other inaccessible to the operator, and a lock for the controlling device controlled by said means.

4. In a camera, the combination with a.

film winding device, a shutter and a shutter 199 operating device, of a guard for rendering the film winding device inaccessible to the operator, means released by the shutter actuating device for locking the guard in operative position and means released by 105 the movement of the izard to ino )erat-ive c position 10]. looking tne shutter operating member.

5. In a camera, the combination with a film winding device, a shutter and a shutter 11( o} ierating device, of a pair of guards for rendering one of said devices inaccessi le to the operator and connected for joint movement, a lock for one of the guards released by the other device, and a'lock for the lat- 11 5 ter released by the other guard.

6. In a camera, the combination wlth. a film winding device, a shutter and-a shutter operating device, of a pair of guards for rendering one of said dev ces inaccessible to 120 the operator and connected for joint 'movement, a lock for one of the guards, released by the other device, for automatically holding it when said guard is moved to operative position, and a lock for the releasing device, 1.25

released by the other guard, for automatically holding said device against return after it is operated. V

7. In a camera, the combination with a camera body having a well therein, a film 130 windingkey in the well, a shutter and a shutter operating device, of a pair of guards for closing the Well and connected for joint 'movemenfi a spring. lock for one of the guards released by the shutter operating de-- vice for automatically holding said guard in closed position, a spring lock for the shutter operating device released by the opening of the other guard for automati cally holding said device against return after it isgopera ted, and means for resetting the r lock when the shutter operating device is actuated.

-8. In a. camera, the combination with a folding film winding key and a shutter operating device, of means under the control of the latter for maintaining the winding key folded.

9. In a camera, the con'ihination with a folding film winding key and a shutter operating device, of means under the control of the latter for maintaining the Winding key folded, and a lock for the shutter operating device controlled by said means.

DAVlD M. HURLBURT.

\Vitnesses M, FRASER, MARGARET DINGNAN. 

